51320233 has 4 divisors (see below), whose sum is σ = 52571988. Its totient is φ = 50068480.

The previous prime is 51320207. The next prime is 51320237. The reversal of 51320233 is 33202315.

51320233 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 33202315 = 5 ⋅6640463.

It can be written as a sum of positive squares in 2 ways, for example, as 2152089 + 49168144 = 1467^2 + 7012^2 .

It is a cyclic number.

It is not a de Polignac number, because 51320233 - 2⁵ = 51320201 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 51320233.

It is not an unprimeable number, because it can be changed into a prime (51320237) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 625816 + ... + 625897.

It is an arithmetic number, because the mean of its divisors is an integer number (13142997).

Almost surely, 2^51320233 is an apocalyptic number.

It is an amenable number.

51320233 is a deficient number, since it is larger than the sum of its proper divisors (1251755).

51320233 is a wasteful number, since it uses less digits than its factorization.

51320233 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1251754.

The product of its (nonzero) digits is 540, while the sum is 19.

The square root of 51320233 is about 7163.8141377342. The cubic root of 51320233 is about 371.6175420426.

Adding to 51320233 its reverse (33202315), we get a palindrome (84522548).

The spelling of 51320233 in words is "fifty-one million, three hundred twenty thousand, two hundred thirty-three".